132 
(Lecanora) 
norce tersce supra saxa silicea prope Dellys Algeriae: Trabut. 
—• Endem. 
816. L. laqueata. Thallus caesius vel caesiomurinus, 
humectatus castaneofuscus, determinatus, in ambitu sublo- 
batus, in centro rimosoareolatus, areolis olivaceis pruinosulis 
inaequalibus angulosis concavis, in margine albis et nonnihil 
pulverulentis; reagentia solita "non agunt. Apothecia nigra 
solitaria vel bina areolis immersa concaviuscula vel plana, 
primitus discoidea a thallo marginata, demum immarginata 
angulosa diam. 0,2-5 mm. Hymenium superne luteo-olivaceum 
in hypothecio incolore, paraphysibus crassis non discretis, 
thecis polysporis. Sporae incolores simplices oblongae, longit. 
0,oo5-6, crassit. 0,oo2 mm. Gelatina hymenea iodo intense 
coerulea. — Calcicola ad Azeba in Algeria 600 m: Flagey 
(Arn. exs. 1434). — Endem. — Quoad thallum comparanda 
Lecidea famosa v. ocellulata Schaer. En. p. 110, Anzi Man. 
No. 65, id. Symb. No. 39, Hepp FI. E. 722, Critt. it. 1083. 
817. L. pruinosa (Sm. E. B. t. 2244) Nyl. Prodr. p. 146. 
— Saxicola in monte Deban Abyssiniae, in Wadi Na-umieh 
superiore Aegypti: Schweinfurth et in Algeria supra mor¬ 
tarium murorum prope Milah 350 m et supra saxa calcaria 
et arenacea ad Constantine: Flagey. — Europ., Argentin. 
818. L. lugens. Thallus nullus. Apothecia conferta 
lecideina nigra plana rarius rimiformia, disco plano, mar¬ 
gine tenuissimo, interdum flexuoso, aetate convexa immargi¬ 
nata, diam. 0,2-1 ,2 mm. Epithecium nigricans, lamina su¬ 
perne violacea in hypothecio fusco, paraphyses coalitae. Sporae 
numerosae in thecis, elongatoellipticae simplices longit. 0, 010 - 12 , 
crassit. 0,0025 mm. Gelatina hymenea iodo intense coerulea. 
A congeneribus sporis majoribus differt. — Graniticola in 
Monte Leonis prope Kapstadt: MacOwan. — Endem. 
